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Apparatus and method for ambient light measurement by a solid state light bulb

  • US 10,082,283 B2
  • Filed: 04/25/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 03/24/2016
  • Status: Active Grant
First Claim
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1. A light fixture with an ambient light sensor, comprising:

  • a solid state light source;

    a light section having a first side and a second side opposite the first side;

    a light guide, coupled to the second side of the light section, comprising a material having a first surface and a second surface opposite the first surface and an edge between the first and second surfaces, wherein the second surface forms an interior volume, the light is transported within the light guide until the light exits from the first or second surface, wherein the solid state light source is located at the edge of the light guide in order to optically couple the light into the light guide at the edge;

    a thermal guide at least partially contained within the interior volume and integrated with the light guide for providing thermal conduction from the light source for cooling the light, wherein an air gap is formed between at least a portion of the thermal guide and the second surface of the light guide, wherein the thermal guide includes a post extending into the interior volume;

    a light sensor located within the interior volume of the light guide;

    a driver for providing power to the solid state light source, wherein the driver is configured to drive the solid state light source with a cyclical signal to repeatedly turn the solid state light source off and on, wherein the solid state light source is turned off and on at a rate sufficient for the light fixture to appear on,wherein the light sensor outputs a signal related to an ambient light level when the solid state light source is off; and

    further comprising an antenna mounted on the post.

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